Manufacture of coal briquets.



UNITED STATES PATENT OFFICE.

GEORGE LEONARD CROUDACE, OF BALMAIN, NEAR SYDNEY, NEXV SOUTH WALES, AUSTRALIA.

MANUFACTURE OF COAL BRIQUETS.

Specification of Letters Patent.

Patented Aug. 21, 1906.

Application filed May 15, 1905. finial No. 260.589.

To all whom 'it may concern:

Be it known that I, GEORGE LEONARD A OUDAOE, a subject of the Kin of Great Britain and Ireland, and a resi ent of 86 Glassop street, Balmain, near Sydney, in the State of New South Wales, Commonwealth of Australia, have invented a certain new and useful Improved Manufacture of Coal Briquets, of which the following is a specification.

The constituents to form the briquets will be starch and flour, silicate of soda, cold water, boilingwater, small coal, and slaked lime. A thin paste is first made in the followin manner, viz: About fifty pounds starch. and flour is thoroughly mixed with about ten allons of cold water. This mixture is t en added to about one hundred gallons of boiling Water, and the Whole must be stirred and kept boiling until the starch or flour is thoroughly cooked and incorporated with the water. To the boiled mixture a )roportion of about five pounds of silicate oi soda will be added.

One ton of small coal and from twenty-five to twenty-eight pounds of ground slaked lime are reduced and thorou hly mixed together in a mill. Each ton oY the coal mixture must be mixed with about ten gallons of the pasty flour and starch mixture and the whole thoroughly inco orated together. The incorporated mass wi 1 then be a brick-press and molded therein mto briquets. The briquets will then be stacked under cover to dry, or artificial heat may be used for this purpose.

The solution will bind and harden the coaldust when it is made u into briquets. It has the further efiect o preventing the escape of a large proportion of the volatile carbon in the coal, rendering the briquets almost smokeless when burning.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

The herein-described process of bri uets consisting in mixing together sma coal and slaked lime and then mixing said coal and lime with a thin pasty mixture, said mixture consisting of starch andflour boiled in Water, adding silicate of soda to said pasty mixture and finally molding the mass into briquets.

In witness whereof I have hereunto set my of two Witnesses. GEORGE LEONARD CKOUDACE.

hand in presence Witnesses:

M a n FIELD NEWTON. Aannu'r MAssEY.

placed in. 

